Mini goldendoodle not herself. I’m worried

[Lily]

I have a 2 year old mini teddybear golden doodle named lily. She is usually very energetic and always happy. But recently she has been extremely lathargic. She will run to her bowl of water to drink as if she has not drank for years and then throw up after. Sometimes she will just make a burp like sound and throw up. Her nose is dry and has crusties on it. Shes not the happy go lucky dog i know and im realy worried. She was diagnosed with lacating patella in her back legs.she has elbow dysplasia and she is going to be 3 years old soon.

The vet hasnt given us much except tell us she is sick. But this is not right! If anyone knows anything about the symptoms i have listed people let me know anything you know at all it would be extremely appreciated.

[Stacy]

Is the surgery they want to do called a Whipple? I don't even know if they do that in dogs, but that's what they do for people with chronic pancreatitis. It's a big surgery. I wouldn't be surprised at a $6000 price tag for that. Also, do they think the pancreatitis is causing the diabetes? And I would wonder if they felt that was reversible with surgery. 

[Nancy, Ned, Clancy, and Charlie]

I don't have any expertise to offer, but I am so sorry Lily is so ill.  I send hugs to you and her.